rtfm.su - dns.ninja
rtfm.su
su
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.ripn.net ⭐ | ||||||
| NS | b.dns.ripn.net | ||||||
| NS | d.dns.ripn.net | ||||||
| NS | e.dns.ripn.net | ||||||
| NS | f.dns.ripn.net | ||||||
| SOA | a.dns.ripn.nethostmaster@ripn.net serial=650209668 | ||||||
MX for
rtfm.su |
Same first word
Similar names
DNS History
13 records (8 active, 5 former)
●NSns1.domenus.ru2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
○NSns1.fatal.ru2015-06-18 → 2016-09-24 · 4 obs
● 2016-09-24 02:25:08
○ 2026-02-15 22:02:58
○ 2026-06-30 20:05:56
○NSns1.hoha.ru2015-06-18 → 2016-09-24 · 4 obs
● 2016-09-24 02:25:08
○ 2026-02-15 22:02:58
○ 2026-06-30 20:05:56
●NSns2.domenus.ru2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
○NSns5.fatal.ru2015-06-18 → 2016-09-24 · 4 obs
● 2016-09-24 02:25:08
○ 2026-02-15 22:02:58
○ 2026-06-30 20:05:56
●MXa.mx.cns.su2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
●MXmx.cns.su2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
○MXmx.fatal.ru2015-06-18 → 2016-09-24 · 4 obs
● 2016-09-24 02:25:08
○ 2026-02-15 22:02:58
○ 2026-06-30 20:05:56
●MXrtfm.su2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
●MXs.mx.cns.su2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
●A2001:470:7240::2026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
●A88.198.54.222026-02-15 → 2026-06-30 · 3 obs
● 2026-02-15 22:02:58
● 2026-06-30 20:05:56
○A92.241.162.822015-06-18 → 2016-09-24 · 4 obs
● 2016-09-24 02:25:08
○ 2026-02-15 22:02:58
○ 2026-06-30 20:05:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| su | e.dns.ripn.net, d.dns.ripn.net, f.dns.ripn.net, b.dns.ripn.net... | - |
| rtfm.su | ns2.domenus.ru, ns1.domenus.ru | - |
✅ Authoritative Response
Server:31.28.20.107
NS records: ns2.domenus.ru, ns1.domenus.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rtfm.su (unsigned zone)
⏱️ Timing
Total: 1151ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 88.198.54.22 |
| AAAA | 1 | 2001:470:7240:: |
| NS | 2 | ns2.domenus.ru, ns1.domenus.ru |
| MX | 4 | rtfm.su (pri: 46), a.mx.Cns.SU (pri: 10)... |
| TXT | 1 | v=spf1 a mx -all |
| SOA | 1 | ns1.domenus.ru support.domenus.ru |
Analysis
Mail Server Role
The MX record for rtfm.su points back to rtfm.su — it is its own mail server.
mx.cns.su, a.mx.cns.su and s.mx.cns.su are frequently seen as mail servers alongside rtfm.su.
IP Addresses
rtfm.su resolves to the IP addresses 88.198.54.22 and 2001:470:7240::
Among the host names that share IP numbers with rtfm.su are pxr.su, ipv6.cns.su, last.su and two others.
Name Servers
rtfm.su is served by two delegated name servers, ns1.domenus.ru and ns2.domenus.ru.
rtfm.su has the same name server delegation as a number of other domains, such as sanitiser.ru, rozaexpress.ru, sjbody.ru and two more.
rtfm.su shares at least some of its name servers with other domains, including domils.ru, tulasm.ru, kinoyug.ru and two others.
Each of the two host names carries two IP addresses: ns1.domenus.ru points to 77.87.208.8 and 2a00:13c0:201:1::2, and ns2.domenus.ru points to 31.28.20.107 and 2a00:13c0:4e:4::4.
Mail Servers
rtfm.su is managed by four mail servers: rtfm.su, mx.cns.su, a.mx.cns.su and s.mx.cns.su.
rtfm.su shares at least some of its mail servers with other domains — for example constantine.su, haz.su, w-w.su and two more.
These mail servers are frequently paired with the mail servers bmi.su, c4m.ru and cm.su.
Hosts with two IP numbers each:
rtfm.su maps to two IP addresses — 88.198.54.22 and 2001:470:7240::.
Hosts that resolve to one IP address:
mx.cns.su points to the IP address 2001:470:7240::.
a.mx.cns.su points to the IP address 88.198.54.22.
s.mx.cns.su points to the IP address 88.198.54.27.
These two host names — rtfm.su and mx.cns.su — each point to 2001:470:7240:: IP addresses.
These two host names — rtfm.su and a.mx.cns.su — each point to 88.198.54.22 IP addresses.